Spinning machine



Nov. 15, 1927.

Filed July 15, 1926 2 heets-Sheet 1 {4n 4 W n w m ida m m Mm v A N m M A q B Q 8 0 AHHH :1 k w mm ,3

l I l I Nov. 15, 1927.

H. SCHMID SPINNING MACHINE Filed July 15,1926 2 Sheet-Sheet 2 lNVENTOR BY ,lA4ATTORNEY.

Patented Nov. 15, 1927.

UNITED STATES HERMAN SCHMID, OF CLEVELAND, OHIO.

SPINNING MACHINE.

Application filed July 15,

My invention relates to a machine for expanding metallic tubular articles and more particularly it relates to a machine for smoothing mouth portions of metallic tubes,

such as tubular bellows.

One of th objects of my invention resides in the provision of an improved expanding mechanism adapted to roll the deformities in the mouth of tubular bellows of a welllrnown type without weakening the same.

Another object of my invention is to pro vide such a mechanism which may be readily adjusted for operating on metallic tubular articles of varying diameters.

Another object of my invention is'to provide an improved machine of this type which is simple and efficient and durable in construction, and capable of quickly and efficiently removing imperfections from the interior and exterior walls of tube end portions in an eflicacious manner.

Another objectof my invention is to readi- 1y effect the gripping and accurate positioning of said tube mouth for such sn'ioothlng operation, parallel to the corrugations 1n the tube.

Other objects of my invention and the 1nvention itself will be apparent from reference to the following description of an embodiment thereof which embodiment is illustrated in the accompanying in:

Referring to the drawings: Fig. 1 is a side elevational view of an apparatus embodying my invention. D

Fig. 2 is a longitudinal medial sectional view of a die and mandrel per se employed in the said embodiment, in operation..

Fig. 3 is a front elevational view of the die part of Fig. 2.

Fig. 4 is a front elevational view of the mandrel part of Fig. 2.

Fig. 5 is a perspective view of oneof the parts employed in th embodiment of Fig. 1.

Fig. 6 is aside elevational view of a metallic bellows, adapted to be operated upon by the apparatus.

Figs. 7 to 10, inclusive, in'elevation, of some of the parts comprised in the said embodiment, and i Fig. 11 is aperspective view of another part employed therein.

Referring to all the figures of the drawings in all of which like parts are designated by like reference characters, at 1, I show in drawings whereare views, mostly 1926. Serial No. 122,535.

general a table for supporting my improved machine frame generally. designated at 2, and at 3 generally an expanding mechanism and mandrel carried upon one end of the said frame, and comprising a die mandrel and article gripper supporting bar 4, a die mandrel 5 and an expanding die 6, said expanding die and mandrel will be hereinafter more fully described in detail.

The machine frame 2 formed preferably of a single casting comprises a base plate 10 and a main body 11 and lateral projection 13 upon which the various parts of the machine are carried. The main body portion 11 extends upwardly from the base 10 and is apertured adjacent one end to permit preferably a driven pulley wheel 12 to rotate therein and provided at the opposite end with the lateral integral projection 13 adapted to support the mandrel supportingbar 4. The frame is suitably ribbed about its edges such as at 14 to reenforce the same for heavy operations.

Bearing boxes 15 and 16 are provided and disposed adjacent the upper edge of the frame being preferably cast integral therewith and arranged in spaced relation to each other and adapted to rotatably support an operating shaft 17. Said shaft has provided on one end an operatorshandle 18 and at its opposite end a cam 19 secured thereto preferably by a tapered pin 20, as shown, or in any suitable manner. Thrust collars 22 and 23 are mounted on the shaft intermediate its ends and contiguous to the inner walls'of the bearing boxes 15 and 16 and adapted to prevent lateral displacement of the shaft therein. Preferably tapered pins 24 are inserted into suitable openings in the collars to retain the same in position on the shaft 17. Bronze bushings 26 and 27 are inserted into the journal boxes 15 and 16, respectively, to provide an efficient bearing for the shaft.

The cam 19, Fig. 1 and Fig. 7, comprises preferably aflat body portion 5.6, having a cylindrical portion 57 at its upper end and a beveled face cammed portion 28 at its lower end which depends from the shaft 17 presenting the beveled face laterally of a.

hollow cylindrical shaft 30 and contiguous to a die expander rod 31. Said shaft 30 is horizontally disposed substantially midway. of the frame and rotatably supported in bearing boxes 32, 33 and 34 all of which are provided with suitable bearing bushing 35 of bronze, or the like. The pulley wheel 12 is secured to the shaft adjacent one end by a pin 94, as shown, or in any well known manner, and adapted to rotate said shaft when receiving power from a source, not shown, but preferably apulley belt driven by an electric motor, or the like. The opposite extremity of the shaftis adapted to carry the expanding die 6 secured thereto by pins 95, or the like.

Thrust collars 36, similar in construction to the thrust collars 22 and 23 are secured to the shaft intermediate its ends and contiguous to the opposed inner faces of the bearings 33 and 84 to prevent lateral movement of the shaft therein.

The expander rod 81 loosely fits within the longitudinal bore 38 of the shaft 30 and is rounded at 39, the rounded end projecting against the beveled portion of the cam 19, as heretofore stated, and adapted to be reciprocated longitudinally within the bore. The opposite extremity of said expander rod 31 is provided with a wedge shaped head 40 and is projected into the central bore 41 of the head 42, the r-eciprocable radially disposed blocks 43 being forced radially inwardly in the radial slots 44 against the beveled por tion 104 of the rod 31, by virtue of the force exerted by the compression springs 45 carried in the recesses 46 on the inner faces of the blocks, the opposite ends of the springs bearing against the plates 47, carried on the periphery of the head 42 and secured thereto by machine screws to close the outer end of the said slots. The slots 44 are provided with overhanging flanges 48 provid ing track Ways for the blocks to slide in; said blocks having beveled inner ends 61 and are apertured at 49 intermediate their ends for the reception of headed pins 50, which pins project laterally therefrom and are each adapted to support a plurality of radially disposed smoothing rollers 51, preferably 3 in number,- each having a reduced portion .107 and a shoulder 108 formed by reducing the same; said rollers being retained thereon by virtue of the enlarged heads 52. These pins are secured to the blocks by trans versely disposed pins adapted to be forced through apertures 54 and 55 in the blocks and pins, respectively.

The die mandrel and bellows gripper 5 are supported adjacent the lower end of the bar 4, which is rigidly secured to the lateral skeleton projection 13, said projection having a centrally disposed opening 58 through which the bar is inserted. and held therein, by virtue of the machine bolt 62 and a pin 68. Said die mandrel and gripper preferably comprise a hollow cylindrical stationary boss 64 having a centrally disposed cylindrical bore 65. Recesses 66 and 67 are provided in the rear face thereof for the reception the securing bolts 106 and pin 105 respectively carried adjacent the lower extremity of the bar 4 to secure the same thereto. The pin 105 is adapted to prevent relative rotative movement of the boss on the supporting bar 4-.

A pair of annular rings 68 and 69 are carried about the periphery of the boss 64, the former of which is disposed to the rear of the latter and is secured to the boss from relative rotation by a set screw 70 inserted through openingTl and adapted to bear against the boss and adapted to prevent lateral moven ent of the ring on the boss 64. The ring 69 is provided with a tap hole 72 and a pair of arcuate slots 73, said ring is adapted to be rotated on the boss 64 by insertion of a suitable tool, not shown, into the tap byan operator. 7

lhe end of the boss 64 adjacent the die head 42 is annularly flanged at 80, and is provided with a vertical slot 81 extending across its full diameter for the reception of a pair of oppositely reciprocable bellows gripping jaws 82, said jaws each having asemi-circular recess or bellows gripping portion 85 formed in their bellow-s abutting ends, the inner peripheries thereof having semi-circular ribs 86 and semi-circular grooves 75, conforming to the corrugation 103 of the bellows, f0 'med thereon, adapted to grip and retain a bellows mouth 110 111 the die mandrel so that the rollers will smooth the mouth thereof parallel to the bellows corrugations. It is to be noted from reference to the drawings that the bellows corrugations are parallel to each other and not of spiral configuration. Adjacent. the outer ends of the iaws are, apertures 186 through which headed pins 87 are inserted, slot abutting ends 74 thereof are adapted to be projected into the arcuate slots 73, heretofore referred to, so that the jaws may be reciprocated in the slots 81 when the ring 69 is rotated.

A die mandrel 88 preferably of disk formation, having a centrally disposed bore 89 is secured in a recess 102 in the flange 80 by machine screws 90 as shown, or in a like ianner and retains the jaws from lateral movement on the boss.

In operation the bores 38, 41, 65 and 89 to, are all arranged 1n 7 heretofore referred axial alignment. Power is received from a source and continuously drivesthe pulley wheel which rotates shaft '30,.the head '42, and its associated parts.

Assuming the machine to be in the position illustrated in Figs. 1' and 2 an article to be worked such as a metallic bellows is placed within the bore of the boss 64 so that the mouth portion projects into the die 88, the walls of which snugly fit within the inner periphery of the die. The prong of a tool, not shown, may be placedinto the tap, hole 72 and the ring 68 may then. be rotated on the boss which causes a cam action to be imparted to the portion 741 of the pins 87 which ride in the arcuate slots 7 3 and in sequence reciprocate the gripping jaws 82 in the grooves 81, inwardly towards each other, causing the ribbed ends 86 and grooves 75, respectively of the recesses 85 to engage a plurality alignment with the mouth portion of the iii bellows, said rollers ar-e retained out'of engagement with the same by compression springs 45, by virtue of the expander rod 31 being out of engagement with the beveled end of the blocks 44:. I

When the operator desires to performthe smoothing operation on the mouth of the bellows the handle 18 is pulled downwardly swinging the cam 19, the beveled face thereof engages the rounded end of the rod 31 and gradually forces the same horizontally to the right in bore 38 andis projected into the bore 41 of the h-ead 42. The wedged head 48 of the rod 31 nowengages the beveled end of the blocks 43, spreads the blocks radially outwardly against the tension of 1 the springs i5 and causes the rollers to move radially outward to engage the inner periphery of the mouth of the bellows to be operated on. The shoulder provided on the exterior surface of each of the rollers by reducing the outer ends thereof is adapted to engage with the edge of the bellows mouth, and in operation when the die 6 carrying the rollers is rotated, the shoulder rides upon and smooths the e'dge'of the bellows mouth.

The rotating smoothing rollers riding about the inner periphery of the article will smooth deformities therefrom without materially weakening the same by virtue of the supporting die mandrel. The operation is continued until the desired result is obtained and the article is then removed from the boss and die mandrel sothat another article may be placed therein. 3

I have found it highly desirable in smoothing and expanding the mouths of metallic bellows and the like that the bellows mouth be retained in parallel relation with the corrugation on the bellows and it is apparent from the above that I have provided a construction which will readily accomplish this desired result.

Having thus described my invention in a single embodiment, I am aware that numerous and extensive departures may be made from the embodiment herein illustrated and of an expander die and are j-ournaled to rotate, means described but without departing from the spirit of my invention.

I claim- 1. In av spinning machine for expanding the mouth of metallic tubes the combination of an expander die and mandrel and a supporting die comprising a head carried on one end of a rotatable shaft, means for receiving power from an external source adapted to rotate the shaft, a plurality of die rollers mounted in the head, means to normally hold the rollers out of contact with the tube mouth and means to expand the rollers into contact with the tube mouth, said mandrel comprising a boss adapted to support means for grippingthe tube and retain the mouth of the same within'the mandrel in coaxial alignment with the die rollers when they are either in their contracted or expanded positions.

2. In a spinning machine for expanding frame therefor, said expander the mouth of metallic tubes the combination I of an expander dieand mandrel and a supporting frame therefoiysaid expander die con'iprising a head carried on one end of a rotatable shaft, means for receiving power from an external source adapted to rotate the shaft, .a plurality of die rollers carried by a plurality of blocks. carried in grooves provided in the hold the rollers out of contact with the tube mouth and means to expand the rollers into contact with the tube, said mandrelcomprising a boss adapted tosupport means for gripping the tube and retain the mouth of the same within the mandrel in coaxial alignment with the die rollers.

3. In a spinning machine for expanding the mouth of metallic tubes the combination mandrel and supporting frame therefor,'said expander die comprising ahead carried on one end of a rotatable shaft, means for receiving power from an external source adapted to rotate the shaft,- three stepped rollers and three blocks slidable within radially disposed grooves in the head, said grooves adapted to slidably retain three blocks said blocks provided with pins upon which the rollers to normally holdthe rollers out of contact withthe tube head, means to normally mouth and means to expand the rollers into contact with the tube, said mandrel comprising a boss adapted to support means for gripping the tube and retain the mouth of the same within the mandrel in coaxial alignment with the die rollers.

at. In aspinning machine for expanding the mouth of metallic tubes the combination of mandrel and a supportan expander die and mg frame therefor, said expander die comrising a head carried on one end of a rotatable shaft, means for receiving power from an external source adapted to rotate i to rotate on pins provided for the purpose,

each blocx adapted to be forced radially inw rdly in the grooves by virtue of a plurality of compression springs adapted to ear upon the blocks at one end and the 0pposite ends thereof anchored in the head.

5. in a spinning machine for expanding the mouth of metallic tubes the combination of an expander die and mandrel anda supporting frame therefor, said expander die comprising a head carried on one end of a rotatable shaft, means for receiving power from an external source adapted to rotate the Sllil'i plurality of die roller-s mounted in the'head, mear to normally hold the rollers out of contact with the tube mouth and a cam ca red by a shaft on the main frame and a reciprocable expander rod car ried within a bore provider in the rotatable shaft, said expander shaft having a rounded end and wedged end, said cam and expander rod adapted to expand the rollers into contact with the tube, said mandrel comprising a boss adapted to support means for gripping the tube and retain the mouth of the same within the mandrel in coaxial alignment with the die rollers.

6. In a spinning machine for'expanding the mouth of metallic tubes the combination of an expander die and mandrel and supporting frame therefor, said expander die comprising a head carried on one end of a rotatable shaft, means for receiving power from an external source adapted to rotate the shaft, a plurality of die rollers mounted in'the head, means to normally hold the rollers out of contact with the tube mouth and means to expand the rollers into contact with the tube, said mandrel comprising a boss adapted to support a pair of article gripping jaws and used to open and close the same to retain the mouth of the article within the mandrel in coaxial alignment with the die rollers or to release the grip on the article so that it may be removed from the mandrel.

7.111 a spinning machine for expanding the mouth of metallic tubes the combination of an expander die and mandrel and a supporting frame therefor, said expander die comprising a head carried on one end of a rotatable shaft, means for receivingpower from an external source adapted to rotate the shaft, a plurality of die rollers mounted in the head, means to normally hold the rollers out of contact with the tube mouth and means to expand the rollers into contact with the tube, said mandrel comprising 21 boss adapted to support a pair of article carried rotadtably on the periphery of the boss and having a pair of arcuate slots, each of said gripping jaws adapted tocarry pins adjacent the outer ends'and adapted to be projected into the arouate slots whereby a oamming action will be effected upon the pins by the arcuate slots when the ring is rotated by a. tool inserted into the tool receiving recess.

8.- In a machine of the class described the combination of an expander mechanism for the mouth of tubes such as metallic bellows and a supporting frame therefor, said expander mechanismcomprising a mandrel and a die, said mandrel comprising a head carried by a bar depending from the frame and adapted to support a. pair of ribbed reciprocable jaws for gripping the bellows and retain the mouth of the same within the mandrel in coaxial alignment with the die, said die comprising a rotatable head carriedon one end of a rotatable shaft, means for 'rrceiv igpower from a source to rotate the shat nd head mounted ad acent the opposite end of the shaft,-a plurality of smoothing rollers mounted on slidable blocks carried in grooves in the head, means to normally hold the rollers out of contact with the bel lows and means carried by the shaft to expand the rollers into contact with the tube when operating on the tube to smooth and expand the walls thereof, and means for reciprocating the bellows gripping jaws.

9. in a spinning machine for expanding metallic tubes, the combination of an expande-r die and mandrel, comprising a rotatable head, means for rotating said head, a plurality of die rollers mounted in the head, means for normally holding the rollers in contact with the tube, means for gripping the tube and a boss on said mandrel adapted to support said gripping means to retain the same indexed relative to the die rollers when they are either expanded or contracted.

10. In a spinning machine for expanding metallic tubes, the combination of an expander die and mandrel, comprisinga rotatable head, means for rotating said head, a plurality of blocl's slidably carried on the head, a plurality of die rollers mounted on the blocks, means for normally holding the rollers in contact with the tube, and a boss on said mandrel adapted to support means for gripping the tube to retain the same indexed relative to the die rollers when they are either expanded or contracted.

In testimony whereof I here-unto afhx my signature this 16th day of June, 1926.

HERMAN SCHMID. 

